Constant power circuit

Constant power circuit

Constant power circuit work by measuring the voltage across and current drawn by the load. The curve representing the power limit for the load for the range of current and voltage magnitudes in which the load circuit may safely operate. Current control circuits are used to accurately control output current of a power supply.

Application 1. Battery chargers are the largest single application for current controlled power supplies requiring either constant-current or constant-power output characteristics.

2. Motor drive applications can also require power supplies with controlled output current.

3. Super-capacitor charger, These new capacitors, which provide impressive capacitance values such as 1F at 5 V in a mere cubic centimeter, can provide high power. The capacitor must first be charged, usually from a battery whose voltage is lower than the voltage on the charged capacitor. This must be done in a controlled manner.

See also Switched-mode power supply Companies that manufacture DC-DC Converters:Vicor Corporation Lambda Electronics, Tyco International, Ltd., Artesyn Technologies, Power-One, Inc., Coil Technology Corporation [edit] References1.^ a b "Making -5V 14-bit Quiet" by Kevin Hoskins 1997

[edit] External links Power Electronics Books Switching regulator application note for LCD Power supply Coil Technology Corporation.


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Power MOSFET — A Power MOSFET is a specific type of Metal Oxide Semiconductor Field Effect Transistor (MOSFET) designed to handle large power. Compared to the other power semiconductor devices (IGBT, Thyristor...), its main advantages are high commutation speed …   Wikipedia

  • Power factor — For other uses, see Power factor (pistol). The power factor of an AC electric power system is defined as the ratio of the real power flowing to the load over the apparent power in the circuit,[1][2] and is a dimensionless number between 0 and 1… …   Wikipedia

  • Constant voltage speaker system — Constant voltage speaker systems refer to networks of loudspeakers which are connected to an audio amplifier using step up and step down transformers to simplify impedance calculations and to minimize power loss over the speaker cables. They are… …   Wikipedia

  • Constant voltage method — is a type of MPPT algorithm.[1] This method makes use of the fact that the ratio of maximum power point voltage and the open circuit voltage is 0.76.[2] It is the simplest MPPT control method.[3] Algorithm The operating point of the PV array is… …   Wikipedia

  • Power supply unit (computer) — Power supply unit with top cover removed A power supply unit (PSU) supplies direct current (DC) power to the other components in a computer. It converts general purpose alternating current (AC) electric power from the mains (110 V to… …   Wikipedia

  • Constant current — is a term most often used in electronics to describe a system that can vary the voltage across an electronic circuit to maintain a constant electric current. When a component is indicated to be driven by a constant current, the driving circuit in …   Wikipedia

  • Power supply — For the Budgie album, see Power Supply (album). A vacuum tube rackmount adjustable power supply, capable of +/ 1500 volts DC, 0 to 100mA output, with amperage limiting capability. A power supply is a device that supplies electrical energy …   Wikipedia

  • Power dividers and directional couplers — A 10 dB 1.7–2.2 GHz directional coupler. From left to right: input, coupled, isolated (terminated with a load), and transmitted port …   Wikipedia

  • Constant capital — Part of a series on Marxism …   Wikipedia

  • Power supply rail — A power supply rail or voltage rail refers to a single voltage provided by a power supply unit (PSU) relative to some understood ground. Although the term is generally used in electrical engineering, most people encounter it in the context of… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”